Draper expert plumb site dual view girder section 600mm spirit level draper expert 41394 levels with front viewing plumb site174 dual view153 vials manufactured from hardened aluminium electrostatically powder coated and baked with polyester acrylic paint one horizontal and two vertical vials one of which has a front viewing plumb site174 dual view153 vial accuracy 175mm per 1m 01176 in standard position manufactured for draper tools by kapro sold loose with display h